Home / 145,218.45-200,420.25-81,556.24

Finding the Fourth Proportional to 145,218.45, 200,420.25 and 81,556.24

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Solution

The fourth proportional to 145,218.45, 200,420.25 and 81,556.24 is: 112,558.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,218.45 : 200,420.25 = 81,556.24 : x
  2. Step 2: Convert to fraction form
    145,218.45/200,420.25 = 81,556.24/x
  3. Step 3: Cross multiply
    145,218.45x = 200,420.25 × 81,556.24
  4. Step 4: Simplify right side
    145,218.45x = 16,345,522,371.82
  5. Step 5: Solve for x
    x = 16,345,522,371.82/145,218.45
  6. Step 6: Final answer
    x = 112,558.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.